Quicksilver 10W-30 4-Stroke Marine Engine Oil, 1 Quart — Synthetic/Mineral Blend for Corrosion & Wear Protection

Clean, stable engine oil is one of the simplest ways to extend the working life of a boat motor. This Quicksilver 10W-30 formula combines high-quality synthetic and mineral base stocks with marine-grade additives to deliver shear strength, viscosity retention and protection against the salty, humid conditions that accelerate corrosion. It meets and exceeds marine 4-stroke specifications, including FC-W and FC-W Catalyst Compatible, and carries manufacturer part number 8M0078616.

How does this oil protect my engine in marine environments?

The additive package in Quicksilver 10W-30 is designed to resist acid formation, fight rust and guard bearings and cylinder walls against wear. Stability under heat and pressure keeps the oil film intact, reducing metal-to-metal contact during heavy throttle or long runs.

• Corrosion inhibitors protect internal surfaces from salt and moisture.
• Anti-wear additives reduce scoring and extend component life.
• Shear-resistant formulation maintains viscosity under load.

Will this oil work in my outboard, sterndrive, or inboard 4-stroke?

Yes — the product is engineered specifically for 4-stroke marine outboards as well as inboard and sterndrive engines. It satisfies industry FC-W requirements and is compatible with catalyst systems, making it suitable across a wide range of modern marine powerplants.

• 10W-30 viscosity for broad operating temperatures and load conditions.
• Recommended for engines requiring FC-W or FC-W Catalyst Compatible oil.
• Fits both recreational and light-commercial marine applications.

How often should I change the Quicksilver 10W-30 in my boat?

Change intervals depend on engine hours, operating conditions and manufacturer guidance. For typical recreational use, follow the engine maker's service schedule; for heavy or corrosive environments, shorten intervals and inspect oil condition regularly.

• Consult your engine manual for manufacturer-recommended service intervals.
• Inspect oil for discoloration or metal particles between changes.
• Shorten intervals if frequently operating in saltwater or high-load conditions.

What are the practical benefits I’ll notice after switching to Quicksilver 10W-30?

Regular use produces smoother idling, reduced knocking under load, and consistent performance during long runs. Maintaining proper oil condition also minimizes unscheduled maintenance and helps preserve resale value by reducing wear-related damage.

• Improved cold-start lubrication with 10W-30 viscosity.
• Steadier oil pressure and reduced noise under load.
• Enhanced resistance to oxidation and viscosity loss over time.

Who is this for? Boaters, marine technicians and fleet managers who run four-stroke outboard, inboard or sterndrive engines and want a dependable, OEM-aligned oil will benefit from Quicksilver 10W-30. It’s particularly useful for owners of Mercury Marine equipment and for anyone seeking an oil that meets FC-W and catalyst-compatibility requirements. Choose this 1-quart bottle for routine top-ups, spot replacements or when following manufacturer service intervals to help protect your investment and keep your vessel on the water.